Two children who appeared to have frozen to death while living in a van in Detroit last month actually died of carbon monoxide poisoning, officials said.

The cause of death of two young children who were sleeping in their family's van was revealed to be carbon monoxide poisoning and not exposure to the cold as Detroit authorities first thought.

Two Detroit children who recently died in a van in below-freezing temperatures were victims of carbon monoxide, not exposure to cold weather, authorities said Wednesday.